start-scroll

wayland/ssd1306-oled-i2c/start-scroll

Activate scroll for all or part of the display. To scroll whole display set FIRST to 00h and LAST to 0Fh.
start-scroll
@/start-scroll
Activate scroll for all or part of the display. To scroll whole display set FIRST to 00h and LAST to 0Fh.
DEV@/ssd1306-oled-i2c-device
An SSD1306 OLED device.
FIRSTbyte
First row
LASTbyte
Last row
DIRbyte
Direction. Options: 00h = left-handed scroll; 01h = right-handed scroll; 02h = diagonal scroll left; 03h = diagonal scroll right.
UPDpulse
Update. Trigger start.
start-scroll
DEV
FIRST
LAST
DIR
UPD
DONE
DONEpulse
Pulses on completion.
To use the node in your project you should have the wayland/ssd1306-oled-i2c library installed. Use the “File → Add Library” menu item in XOD IDE if you don’t have it yet. See Using libraries for more info.

C++ implementation

struct State {
};

{{ GENERATED_CODE }}

void evaluate(Context ctx) {
    // The node responds only if there is an input pulse
    if (!isInputDirty<input_UPD>(ctx))
        return;

    // Get a pointer to the `Adafruit_SSD1306` class instance
    auto display = getValue<input_DEV>(ctx);
    auto first = getValue<input_FIRST>(ctx);
    auto last = getValue<input_LAST>(ctx);
    auto direction = getValue<input_DIR>(ctx);

    switch (direction) {
        case 0:
            display->startscrollleft(first, last);
            break;
        case 1:
            display->startscrollright(first, last);
            break;
        case 2:
            display->startscrolldiagleft(first, last);
            break;
        case 3:
            display->startscrolldiagright(first, last);
            break;
    }

    emitValue<output_DONE>(ctx, 1);

}